use the ppa
Yeah I tried that too but wasn't sure exactly how to do it, sorry I forgot. But you have to remember you're talking to a complete n00b here when it comes to ubuntu. Can you or anyone else post a step by step please, or a link that fully explains how to do it?
in the terminal run this command, to add the bitcoin repo:
sudo add-apt-repository ppa:bitcoin/bitcoin
and then update:
sudo apt-get update
and then, to install bitcoin:
sudo apt-get install bitcoin